i apologize if i asked a stupid question can any body sugget me how can i retrieve pdb files of human chromosome 17(i mean proteins, which are there on chromosome 17) thanks for ur earlier reply cheers Subba Raju Sagi, i labs SAGA Bio-informatics Phone : 91-040-3352900/2 Ext.2006 Fax : 91-040-3351522 Email : subba_raju@i-labs.ws http://www.i-labs.ws